String mop



FIG. 1 is a top, front, left perspective view of the string mop showing my new design;

FIG. 2 is a top-front perspective view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof.

Stippling and line shading have been used in the drawings to indicate a contrast in appearance. The broken lines depict portions of the string mop that form no part of the claimed design. 

CLAIM The ornamental design for a string mop, as shown and described. 